Sometimes when I need to reset what I'm working on I'll ask a model to jump. Jumping in place, running and jumping, turning in circles, whatever they want to do. When it is really cold out the people I'm working with will generally appreciate the opportunity to get the circulation going.
I really like the way the white cloth is wrapping around the model's hand. There was a bit of wind going on this particular day and it made some pretty great yet subtle movement in the fabric